[PATCH] Remove XFS_BUF_SHUT() and friends

[Lachlan McIlroy]

Christoph Hellwig wrote:
> On Thu, Dec 04, 2008 at 06:27:16PM +1100, Lachlan McIlroy wrote:
>> Code does nothing so remove it.
> 
> Looks good to me.  Does anyone remember why this flag was set on IRIX?

During a forced shutdown we would go through all incore buffers and mark
them B_STALE/B_ERROR/B_SHUT and then call biodone() on them.  The code in
xfs_buf_iodone_callbacks() that checks for B_SHUT is to avoid a double
biodone() I think.  We don't have the code in the Linux port that scans
through all the incore buffers on a forced shutdown but we still have one
case in xfs_iflush_cluster().  In any case it's not doing anything.